Loading...
HSChapter 84
U.S. imports of parts for central heating boilers (HS 840390) totaled $11.4M in May 2026, traded with 37 countries.
Importers of Parts for Central Heating Boilers paid $1.1M in duties in May 2026 — an effective duty rate of 11% on $10.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts for Central Heating Boilers imports of $11.4M in May 2026 ran 24% above the year-to-date monthly average of $9.2M.
Last updated: May 2026 dataSouth Korea leads US imports of central heating boiler parts, followed by China and France, reflecting the concentration of boiler manufacturing expertise in those markets. All imports enter under a single 10-digit line, 8403900000, which simplifies classification but means any part — from heat exchangers to burner assemblies — must be confirmed as specifically designed for central heating boilers rather than steam-generating or industrial boilers. Importers sourcing from China should note that these goods may be subject to Section 301 tariffs, making origin documentation and first-sale valuation strategies particularly relevant.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The key distinction is the boiler type the part is designed for: heading 8403 covers parts for hot-water central heating boilers (typically residential or commercial hydronic systems), while heading 8402 covers steam or vapor-generating boilers used in industrial or power-generation contexts. If a part is interchangeable between both types, classification generally follows the principal use or the boiler it is presented with.
Yes. Imports from China in this category are generally subject to Section 301 tariffs. Importers should verify the current tariff treatment with a licensed customs broker, as rates and product exclusions can change.
Supplier Network
Get discovered by U.S. importers searching for HS 840390 — Parts for Central Heating Boilers. Be the first supplier listed.
Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $1.2M | $1.2M | +$75K |
| NETHERLANDS | $2.2M | $9K | -$2.2M |
| KOREA, SOUTH | $2.0M | $16K | -$2.0M |
| CHINA | $1.7M | -- | -$1.7M |
| FRANCE | $1.2M | -- | -$1.2M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8403900000 | PARTS FOR CENTRAL HEATING BOILERS | $9.7M | 8.35% | 92.74% | $808K |
PARTS FOR CENTRAL HEATING BOILERS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8403900000 | PARTS FOR CENTRAL HEATING BOILERS | $1.6M |
PARTS FOR CENTRAL HEATING BOILERS
14.3K kg
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Pennsylvania | $2.1M | $88K | -$2.0M |
| Arkansas | $1.6M | -- | -$1.6M |
| Georgia | $846K | $165K | -$681K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $2.0M | -- | -$2.0M |
| HOUSTON, TX | $1.8M | -- | -$1.8M |
| LOS ANGELES, CA | $840K | -- | -$840K |